diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 261f433..c52e96d 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -91,7 +91,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.11", "3.12", "3.13", "3.14", "pypy3.11"]
+        python-version: ["3.11", "3.12", "3.13", "3.14", "3.15", "pypy3.11"]
         include:
           - os: windows-latest
             python-version: "3.13"
@@ -104,6 +104,8 @@ jobs:
         uses: actions/setup-python@v7
         with:
           python-version: ${{ matrix.python-version }}
+          # use a release candidate while a version has no final release
+          allow-prereleases: true
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
diff --git a/setup.py b/setup.py
index 8707136..d4b6c40 100644
--- a/setup.py
+++ b/setup.py
@@ -38,6 +38,7 @@
     'Programming Language :: Python :: 3.12',
     'Programming Language :: Python :: 3.13',
     'Programming Language :: Python :: 3.14',
+    'Programming Language :: Python :: 3.15',
     'Programming Language :: Python :: Implementation :: CPython',
     'Programming Language :: Python :: Implementation :: PyPy',
     'Topic :: Software Development :: Libraries',